Ventilating-roof.



. PATENTED SEPT. 18, 1906.

J". BRASELTON.

VENTILATING ROOF.

APPLIGATIIONVIILED MAB.8, 1906.

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JOHN BRASELTON, OF DANVILLE. ILLINOIS.

VENTlLATING-ROOF.

Specification of Letters Patent.

Patented Sept. 18, 1906.

Application filed March 8, 1906. Serial No. 804,992.

To all whom it may concern.-

Be it known that I, JOHN BRASELTON, a citizen of the United States,residing at Danville, in the county of Vermilion and State of Illinois,have invented new and useful Im provements in Ventilating-Roofs, ofwhich the following is a specification.

This invention is a roof designed to provide ventilation for thebuilding or rooms under the same and such ventilation to be produced bynovel and effective means for heating the air in the garret and allowingthe same to escape through the roof, the garret being connected bysuitable openings or conduits with the rooms below, which will have theeffect of drawing the foul air out of the rooms and carrying the same upthrough the roof, and since the flow of air is induced by the heatingaction of the sun on the air in the garret the ventilation or amount ofair which is carried off will increase as the heat of the sun increases,thereby affording a very pleasant relief in hot weather and providing asupply of fresh air at all times.

In the accompanying drawings, Figure 1 is a cross-section of the roofand upper part of a building provided with the invention. Fig. 2 is alongitudinal section thereof on the line 2 2 of Fig. 1.

Referring specifically to the drawings, the rafters of the main roof areindicated at 6, and the shingles or other covering at 7. These partsform an outer roof which in construction is not essentially differentfrom an ordinary gable-roof. At or about the middle at the top it has anopening 8, covered by a cap 9. The joists in the garret are indicated at10, supporting the ceilings of the rooms below, as indicated at 11, andlocated in these ceilings are boxed openings 12, of which there may beas many as desired, according to the rooms and halls to be ventilated.By means of pipe extensions from one or more of such openings rooms inone or more stories below can be ventilated.

Within the garret, constructed as above stated, I construct a smallerroof or structure consisting of short rafters 13, covered by boards 14.This inner roof runs from one gable end to the other, as clearly shownin Fig. 2. The rafters 13 are set at their lower ends upon the top ofthe joists 10, and the covering 14 extends down to the upper edge ofsaid joists. This leaves spaces between the joists and between the loweredge of said inner roof and the ceiling 11, through which air can escapeinto the space between the inner and outer roofs. It is in the latterspace that the air confined between the outer roof 7 and the inner roof14 becomes highly heated, the space forming a sort of flue in which theair is heated by the heat of the sun, and it is confined againstsubstantially any circulation except an upward flow through the opening8. The sun beating on the outer roof rapidly heats the air in thecontracted space thereunder, and the air flows out through the openingin the top. This induces a draft from the space under the inner roof,and consequently from the rooms below, through the openings 12. Thegable ends and other parts of the roof are all made as tight as possibleto assist the draft from the rooms below, so that all the air whichpasses out at the top of the roof is drawn through the rooms. I

I am aware that it is old to make holes covered by a cap in the top of aroof for the purpose of ventilation and also that it has been proposedto connect the garret with the rooms below by means of ducts; but Ibelieve that I am the first to contract the space within a garret by theconstruction of an inner or false roof, in which contracted space theair is more readily heated and from which it will flow with greaterfreedom for the purpose of creating a stronger draft through theroomsbelow.

The openings 8 in the top of the roof covered by the caps 9 can bemultiplied, if desired, depending on the size of the house and thenumber of rooms to be ventilated. Thus for a house containing a largenumber of rooms several of said outlets may be made along the ridge ofthe roof. The preferred manner of conducting air from a lower room, asreferred to hereinbefore, is to provide openings in the ceiling of suchlower rooms and then provide pipes extending from said openings throughthe ceilings and through the side walls of the upper room to the spacebetween the upper and lower roofs. Each of the openings or boxes 12 isprovided with a valve 12, which may be opened or closed, as desired, sothat one or more of the rooms may be ventilated.

The invention will be found particularly useful for hospitals orsick-rooms. For example, when a person is sick the ventilation may beapplied to the room, and by shutting off more or less of the other roomsthe draft can be made as strong as desired. This will provide pure airand sufficient ventilation for the sick person and in addition tend toprevent the spread of contagious diseases.

If desired, a pipe may extend from the ventilating-box in the ceiling toa position directly over the patient, so that odors arising will beimmediately conducted away through the ventilator. By opening or closingmore or less of the valves the whole force of the ventilation can beapplied to more or less rooms.

The device will serve to conduct smoke from a kitchen, for instance, andwill be found useful in very many other particulars.

I claim 1. The combination with an outer inclined roof having aventilating-opening at the top, of an inner roof thereunder, forming acontracted space between the roofs, and having openings into the bottomof said space from the rooms below.

2. The combination with the garret-joists, having openings in theceiling therebetween from the rooms below, of a main outer gableroof,having a ventilating-o ening at the top, and an inner roof eXten ingbetween the gable ends and supported on the joists over said openingsand having sides substantially parallel with those of the outer roof,forming a contracted space which communicates between the joists withthe openings in the ceil- Tn testimony whereof I have signed my name tothis specification in the presence of two subscribing witnesses.

JOHN BRASELTON.

Witnesses:

J. ALBERT MILLER, CLAUDE A. ALLEN.

